513091 has 4 divisors (see below), whose sum is σ = 514800. Its totient is φ = 511384.

The previous prime is 513083. The next prime is 513101. The reversal of 513091 is 190315.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 513091 - 2³ = 513083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 271 + ... + 1048.

It is an arithmetic number, because the mean of its divisors is an integer number (128700).

2⁵¹³⁰⁹¹ is an apocalyptic number.

513091 is a deficient number, since it is larger than the sum of its proper divisors (1709).

513091 is a wasteful number, since it uses less digits than its factorization.

513091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708.

The product of its (nonzero) digits is 135, while the sum is 19.

The square root of 513091 is about 716.3037065379. The cubic root of 513091 is about 80.0567826038.

It can be divided in two parts, 51 and 3091, that multiplied together give a triangular number (157641 = T₅₆₁).

The spelling of 513091 in words is "five hundred thirteen thousand, ninety-one".